I will only gently enter this thread long enough to suggest that audio explorers might want to try small gauge magnet wire as speaker cable. I run 15' lengths of drill twisted #26 gauge and have for years. This is principally for high sensitivity transducers. Lansing and Hilliard recommended the matching of input and output impedances in 1945 when they introduced the Voice of the Theatre systems. Their crossover impedance was 12 ohms; It is hard to imagine the power amplifier that would have had such a high output impedance. Anyway, injecting another ohm or two in the speaker wire seems to do no harm and might actually do some good. The clarity and immediacy of the sound is hard to beat. I used to suggest online that with careful shopping the intrepid audiophile might keep his speaker cable costs under $5 per mile!